The Helicopter SpeedPlay by Erector features a new screw/nut system for faster building action and it also includes a battery operated power tool for assembly which turns into a motor providing motion to the finished model. There are 3 sleek models to choose from. Only one model may be build at a time. A perfect construction set for the intermediate builder! Pieces: 280 + / Batteries Required 3 “AAA” Age: 7+